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Carob pod: A new substrate for citric acid production by Aspergillus niger

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Abstract

The production of citric acid from carob pod extract byA. niger in surface fermentation was investigated. A maximum citric acid concentration (85.5 g/L), citric acid productivity (4.07 g/L/d), specific citric acid production rate (0.18 g/g/d), and specific sugar uptake rate (0.358 g/g/d) was achieved at an initial sugar concentration of 200 g/L, pH of 6.5, and a temperature of 30°C. Other kinetic parameters, namely, citric acid yield, biomass yield, specific biomass production rate, and fermentation efficiency were maximum at pH 6.5, temperature 30°C, and initial sugar concentration 100 g/L. The external addition of methanol into the carob pod extract at a concentration up to 4% (v/v) improved the production of citric acid.

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Roukas, T. Carob pod: A new substrate for citric acid production by Aspergillus niger. Appl Biochem Biotechnol 74, 43–53 (1998). https://doi.org/10.1007/BF02786885

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  • DOI: https://doi.org/10.1007/BF02786885

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